diff -Naur linux-2.6.26.5.orig/arch/x86/kernel/cpu/common.c linux-2.6.26.5/arch/x86/kernel/cpu/common.c
--- linux-2.6.26.5.orig/arch/x86/kernel/cpu/common.c	2008-09-08 19:40:20.000000000 +0200
+++ linux-2.6.26.5/arch/x86/kernel/cpu/common.c	2008-10-03 21:41:42.000000000 +0200
@@ -205,7 +205,7 @@
 	}
 	if (!printed) {
 		printed++;
-		printk(KERN_ERR "CPU: Vendor unknown, using generic init.\n");
+		printk(KERN_ERR "CPU: Vendor unknown with vendor_id '%s', using generic init.\n", v);
 		printk(KERN_ERR "CPU: Your system may be unstable.\n");
 	}
 	c->x86_vendor = X86_VENDOR_UNKNOWN;
diff -Naur linux-2.6.26.5.orig/arch/x86/kernel/cpu/Makefile linux-2.6.26.5/arch/x86/kernel/cpu/Makefile
--- linux-2.6.26.5.orig/arch/x86/kernel/cpu/Makefile	2008-09-08 19:40:20.000000000 +0200
+++ linux-2.6.26.5/arch/x86/kernel/cpu/Makefile	2008-10-03 21:37:35.000000000 +0200
@@ -12,6 +12,7 @@
 obj-$(CONFIG_X86_32)	+= transmeta.o
 obj-$(CONFIG_X86_32)	+= intel.o
 obj-$(CONFIG_X86_32)	+= umc.o
+obj-$(CONFIG_X86_32)	+= sis.o
 
 obj-$(CONFIG_X86_MCE)	+= mcheck/
 obj-$(CONFIG_MTRR)	+= mtrr/
diff -Naur linux-2.6.26.5.orig/arch/x86/kernel/cpu/sis.c linux-2.6.26.5/arch/x86/kernel/cpu/sis.c
--- linux-2.6.26.5.orig/arch/x86/kernel/cpu/sis.c	1970-01-01 01:00:00.000000000 +0100
+++ linux-2.6.26.5/arch/x86/kernel/cpu/sis.c	2008-10-03 21:56:17.000000000 +0200
@@ -0,0 +1,20 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/processor.h>
+#include "cpu.h"
+
+static struct cpu_dev sis_cpu_dev __cpuinitdata = {
+	.c_vendor	= "SiS",
+	.c_ident 	= { "SiS SiS SiS " },
+	.c_models = {
+		{ .vendor = X86_VENDOR_SIS, .family = 5, .model_names =
+		  { 
+			  [0] = "550", 
+			  [1] = "551", 
+			  [2] = "552", 
+		  }
+		},
+	},
+};
+
+cpu_vendor_dev_register(X86_VENDOR_SIS, &sis_cpu_dev);
diff -Naur linux-2.6.26.5.orig/include/asm-x86/processor.h linux-2.6.26.5/include/asm-x86/processor.h
--- linux-2.6.26.5.orig/include/asm-x86/processor.h	2008-09-08 19:40:20.000000000 +0200
+++ linux-2.6.26.5/include/asm-x86/processor.h	2008-10-03 21:43:49.000000000 +0200
@@ -118,7 +118,8 @@
 #define X86_VENDOR_CENTAUR	5
 #define X86_VENDOR_TRANSMETA	7
 #define X86_VENDOR_NSC		8
-#define X86_VENDOR_NUM		9
+#define X86_VENDOR_SIS		9
+#define X86_VENDOR_NUM		10
 
 #define X86_VENDOR_UNKNOWN	0xff